Hey man, I see your point. But keep in mind that the scream could trigger while the player is already in the room with the ghost girl group, or at any other point... It all depends on the player's pace. This gives the scream a sort of 'new role,' since it can go off at different moments for everyone depending on how they play through those 70 seconds.
By the way, I finally removed the only unnecessary loading screen, along with a level that only contained a single script (I moved that script to its original intended level). To see these changes, just replay level '9'